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Online Tests
Physics ECAT Pre Engineering Online Test MCQs With Answers
Question # 1
A particle having mass and charge equal to that of an electron is called:
Choose an answer
Proton
Positron
Pion
Pi-meson
Both (C) and (D)
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Question # 2
Ethanol (alcohol) is a type of:
Choose an answer
Electric fuel
Bio fuel
Nuclear fuel
None of these
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Question # 3
Astrophysics is a branch of physics, which deals with:
Choose an answer
Sub-atomic particles
Stars and galaxies
Light and sound
Music
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Question # 4
Consider a spherical shell of metal at he centre of which a positive point charge is kept
Choose an answer
The electric filed is zero outside the shell
The electric field is zero everywhere
The electric field is zero in the region inside the shell
The electric field is non-zero in both regions outside and inside the shell
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Question # 5
The electric flux is linked with a surface will be maximum when
Choose an answer
The surface is held parallel to the electric field
The surface is held perpendicular to the electric field
The surface makes an angle of 45
° with the electric field
All of the above
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Question # 6
The SI unit of magnetic flux is
Choose an answer
NmA
-2
NmA
-1
NAm
-1
Nm
2
A
-1
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Question # 7
Mass of neutron is
Choose an answer
1.67 x 10
-31
kg
1.67 x 10
-27
kg
9.1 x 10
-31
kg
1.67 x 10
-
19kg
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Question # 8
A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:
Choose an answer
First
Second
Third
None of these
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Question # 9
A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be
Choose an answer
Zero
10
Ω
1
Ω
0.10
Ω
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Question # 10
The SI unit of magnetic permeability is
Choose an answer
WB A
-1
m
-1
WB mA
-1
WB Am
-1
None of these
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Question # 11
The induced current is a conductor depends upon:
Choose an answer
Resistance of the loop
Speed with which the conductor moves
Any of these
Both (A) and (B)
None of these
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Question # 12
If the instantaneous velocity of a body does not change. the body is said to be moving with
Choose an answer
average velocity
uniform velocity
instantaneous velocity
variable velocity
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Question # 13
Which of the following is not an example of intertial frame
Choose an answer
a body placed on the surface of earth
a body placed in a car moving with uniform velocity
a body placed in a car moving with same acceleration
none of these
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Question # 14
The e/m of an electron moving in a circular path in a magnetic field is equal to
Choose an answer
V/Br
V/B
2
r
2
V
2
/Br
2
V
2
/Br
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Question # 15
At the top of the trajectory of a projectile the acceleration is
Choose an answer
The maximum
The minimum
Zero
g
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Question # 16
The body will move with terminal velocity when it acquires
Choose an answer
minimum speed
zero speed
maximum speed
none of them
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Question # 17
The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is
Choose an answer
100 J
1.6 x 10
-17
J
100 eV
1.6 x 10
-17
eV
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Question # 18
Self inducede e.m.f. is also called
Choose an answer
Motional e.m.f.
Thermistor
Electrostatic induction
Back e.m.f
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Question # 19
The force exerted by the fluid in a hydraulic pump on the piston is 10 cm
2
, the fluid pressure on the piston is, in N/cm
2
Choose an answer
20
200
2000
20,000
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Question # 20
Velocity of a body changes if
Choose an answer
direction of the body changes
speed of the body changes
neither speed nor direction changes
either speed or direction changes
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Question # 21
Physics details with the study of:
Choose an answer
Matter
Energy
Both of them
Human body
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Question # 22
Internal energy is the sum of all the forms of
Choose an answer
K.E
P.E
both of them
none of them
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Question # 23
The useful unit of the angular displacement in SI unit is:
Choose an answer
Degree
Revolution
Radian
Metre
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Question # 24
The earth's potential is taken as
Choose an answer
Negative
Positive
Zero
Infinite
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Question # 25
The current in LCR circuit will be maximum when
ω
is
Choose an answer
As large as possible
Equal to natural frequency of LCR system
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Question # 26
Pressure exerted by a gas is
Choose an answer
Independent of density of the gas
Inversely proportional to the density of the gas
Directly proportional to the square of the density of the gas
Directly proportional to the density of the gas
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Question # 27
Work done is maximum when angle between force and displacement is
Choose an answer
0°
90°
180°
None of these
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Question # 28
Linear momentum is a
Choose an answer
fixed quantity
constant quantity
scalar quantity
vector quantity
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Question # 29
A real gas can be approximated to an ideal gas at
Choose an answer
Low density
High pressure
High density
Low temperature
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Question # 30
The SI unit of flux density is.
Choose an answer
Tesla
Weber
Gaun
Weber/meter
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Question # 31
When a silicon crystal is doped with a pentavalent element, such an extrinsic semi-conductor is called
Choose an answer
p-type semi-conductor
n-type semi-conductor
either of them
none of them
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